Stellar weak decay rates in neutron-deficient medium-mass nuclei

2011/02/02 by P. Sarriguren · 1 citation
Physics and Astronomy · #Astronomical and nuclear sciences #Atomic physics #Beta decay #Condensed matter physics #Double beta decay #Excited state #Isotope #Neutron #Nuclear physics #Nuclear physics research studies #Physics #Proton #Quantum Chromodynamics and Particle Interactions #Quasiparticle #Random phase approximation #astro-ph.SR #nucl-th

paper · pdf · doi:10.1103/physrevc.83.025801

published as Phys.Rev.C83:025801,2011 · 24 pages, 16 figures

openalex publication_date 2011/02/02 · arxiv created 2011/02/03 · arxiv updated 2011/02/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Weak decay rates under stellar density and temperature conditions holding at the rapid proton-capture process are studied in neutron-deficient medium-mass waiting-point nuclei extending from Ni up to Sn. Neighboring isotopes to these waiting-point nuclei are also included in the analysis. The nuclear structure part of the problem is described within a deformed Skyrme Hartree-Fock+BCS+quasiparticle random-phase-approximation approach, which reproduces not only the \ensuremathβ-decay half-lives but also the available Gamow-Teller strength distributions, measured under terrestrial conditions. The various sensitivities of the decay rates to both density and temperature are discussed. In particular, we study the impact of contributions coming from thermally populated excited states in the parent nucleus and the competition between \ensuremathβ decays and continuum electron captures.

Citations

• Deformation of theN=ZNucleusSr<mml:mprescripts/><mml:none/>76usingβ-Decay Studies
• Nuclear weak-interaction processes in stars
• Explosive hydrogen burning
• Ground-state properties of exotic nuclei near Z = 40 in the relativistic mean-field theory
• Electric monopole transitions from low energy excitations in nuclei
• Estimates of Stellar Weak Interaction Rates for Nuclei in the Mass Range A = 65–80
• The Nubase evaluation of nuclear and decay properties
• Half-lives of rp-process waiting point nuclei
• rp-process nucleosynthesis at extreme temperature and density conditions
• β-decay half-life of therp-process waiting-point nuclideMo<mml:mprescripts/><mml:none/>84

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• Stellar electron-capture rates in pf-shell nuclei from quasiparticle random-phase approximation calculations